/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const forEachBail = require("./forEachBail");
/** @typedef {import("./Resolver")} Resolver */
/** @typedef {import("./Resolver").JsonObject} JsonObject */
/** @typedef {import("./Resolver").JsonValue} JsonValue */
/** @typedef {import("./Resolver").ResolveContext} ResolveContext */
/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
/**
* @typedef {Object} DescriptionFileInfo
* @property {JsonObject=} content
* @property {string} path
* @property {string} directory
*/
/**
* @callback ErrorFirstCallback
* @param {Error|null=} error
* @param {DescriptionFileInfo=} result
*/
/**
* @typedef {Object} Result
* @property {string} path path to description file
* @property {string} directory directory of description file
* @property {JsonObject} content content of description file
*/
/**
* @param {Resolver} resolver resolver
* @param {string} directory directory
* @param {string[]} filenames filenames
* @param {DescriptionFileInfo|undefined} oldInfo oldInfo
* @param {ResolveContext} resolveContext resolveContext
* @param {ErrorFirstCallback} callback callback
*/
function loadDescriptionFile(
resolver,
directory,
filenames,
oldInfo,
resolveContext,
callback
) {
(function findDescriptionFile() {
if (oldInfo && oldInfo.directory === directory) {
// We already have info for this directory and can reuse it
return callback(null, oldInfo);
}
forEachBail(
filenames,
/**
* @param {string} filename filename
* @param {(err?: null|Error, result?: null|Result) => void} callback callback
* @returns {void}
*/
(filename, callback) => {
const descriptionFilePath = resolver.join(directory, filename);
if (resolver.fileSystem.readJson) {
resolver.fileSystem.readJson(descriptionFilePath, (err, content) => {
if (err) {
if (typeof err.code !== "undefined") {
if (resolveContext.missingDependencies) {
resolveContext.missingDependencies.add(descriptionFilePath);
}
return callback();
}
if (resolveContext.fileDependencies) {
resolveContext.fileDependencies.add(descriptionFilePath);
}
return onJson(err);
}
if (resolveContext.fileDependencies) {
resolveContext.fileDependencies.add(descriptionFilePath);
}
onJson(null, /** @type {JsonObject} */ (content));
});
} else {
resolver.fileSystem.readFile(descriptionFilePath, (err, content) => {
if (err) {
if (resolveContext.missingDependencies) {
resolveContext.missingDependencies.add(descriptionFilePath);
}
return callback();
}
if (resolveContext.fileDependencies) {
resolveContext.fileDependencies.add(descriptionFilePath);
}
/** @type {JsonObject | undefined} */
let json;
if (content) {
try {
json = JSON.parse(content.toString());
} catch (/** @type {unknown} */ e) {
return onJson(/** @type {Error} */ (e));
}
} else {
return onJson(new Error("No content in file"));
}
onJson(null, json);
});
}
/**
* @param {null|Error} [err] error
* @param {JsonObject} [content] content
* @returns {void}
*/
function onJson(err, content) {
if (err) {
if (resolveContext.log)
resolveContext.log(
descriptionFilePath + " (directory description file): " + err
);
else
err.message =
descriptionFilePath + " (directory description file): " + err;
return callback(err);
}
callback(null, {
content: /** @type {JsonObject} */ (content),
directory,
path: descriptionFilePath
});
}
},
/**
* @param {null|Error} [err] error
* @param {null|Result} [result] result
* @returns {void}
*/
(err, result) => {
if (err) return callback(err);
if (result) {
return callback(null, result);
} else {
const dir = cdUp(directory);
if (!dir) {
return callback();
} else {
directory = dir;
return findDescriptionFile();
}
}
}
);
})();
}
/**
* @param {JsonObject} content content
* @param {string|string[]} field field
* @returns {JsonValue | undefined} field data
*/
function getField(content, field) {
if (!content) return undefined;
if (Array.isArray(field)) {
/** @type {JsonValue} */
let current = content;
for (let j = 0; j < field.length; j++) {
if (current === null || typeof current !== "object") {
current = null;
break;
}
current = /** @type {JsonObject} */ (current)[field[j]];
}
return current;
} else {
return content[field];
}
}
/**
* @param {string} directory directory
* @returns {string|null} parent directory or null
*/
function cdUp(directory) {
if (directory === "/") return null;
const i = directory.lastIndexOf("/"),
j = directory.lastIndexOf("\\");
const p = i < 0 ? j : j < 0 ? i : i < j ? j : i;
if (p < 0) return null;
return directory.slice(0, p || 1);
}
exports.loadDescriptionFile = loadDescriptionFile;
exports.getField = getField;
exports.cdUp = cdUp;